bathysphere

As nouns the difference between bathysphere and null

is that bathysphere is bathysphere while null is zero, nil; the cardinal number before einn.

As a letter s

is the letter s with a.

As a noun bathysphere is

bathysphere.

is likely misspelled.

has no English definition.

As a noun bathysphere

is a spherical steel deep-diving chamber with perspex windows, in which persons are lowered to the depths by a cable to study the oceans and deep-sea life; the precursor to the bathyscaphe.